Improvement in centrifugal machines



l. SPARHW. Centrifuga! Machines@ Patented May 6,

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v JT jvcarrowu UNITED STATES PATENT EEIcE.

JOHN sPAEnOw, OE PORTLAND, MAINE.

IMPROVEMENT IN CENTRIFUGAL MACHINES.

Specication forming part of Letters Patent N o. 138,705, dated May 6,1873,' application iltd March 19, 1873.

To all whom it may concern:

Be it known that I, JOHN SPARROW, of Portland, in the county ofCumberland and State of Maine, have invented a new and ImprovedCentrifugal Sugar-Machine 5 and I do hereby declare the following to bea full and exact description of the same, reference being had to theaccompanying drawing forming part of this specification, in which-nFigure l is a plan view of the` base of the machine, and Fig. 2 is acentral section of the same.

Similar letters of reference in the accompanying drawing denote the sameparts.

This invention relates to that class of machines in which sugar, duringthe process of its manufacture, is separated from the sirup with which-it is mixed in the state in which it comes from the vacuum-pan, byplacing it in a hollow revolving drum with a sieve-like periphery, bythe centrifugal action of which the sirup is thrown out through thesieve, leaving the sugar within the latter.

The invention has for its object to improve the construction of such amachine in such a manner as to facilitate the removal ofthe sirup thusseparated from the shell in which itis caught immediately' after itsseparation, and to direct it to the tanks provided for its reception. Tothis end the invention consists in the combination and arrangement ofparts, which I will now proceed to describe.

In the accompanying drawing, A is the revolving perforated drum, intowhich the sugar and sirup are poured for separation, said drum beingmounted in the usual vertical position, and requiring no furtherdescription as to its construction and operation. B is the usualcylindrical shell that incloses the drum A, said shell being attached tothe base C in such a manner as to be detachable, to allow of the repairof the wire-netting of the drum without removing it. The base O is anannular chamber having an inner concentric wall, D, situated beneath thebottom of the drum A. Between the walls B C are placed two inclinedplanes, E, of equal dimensions, one on one side of the annular chamberand the other on the other side, their width being equal to that of thechamber. rlhe lower ends of these planes coincide with the bottom of theannular chamber, and between their upper ends and the said bottom arevertical partitions Gr, which completely separate the spaces beneath theplanes E from those above them. These planes, together with their vsidewalls C D, form curved channels, which receive the sirup as it fallsfrom the inside of the shell B and conduct it to outlets at the feet ofthe planes E, the inclination of the latter facilitating the flow of thesirup. The spaces F beneath the planes E form heating-chambers, whichare supplied with steam, water, or other agent through pipes H. The heatfrom this agent warms the planes E, and thus facilitates the running ofthe sirup and its separation into different grades. I are pipes openin gout of the bottom of the annular chamber at the lower ends of the planesE, and between these ends and the partitions Gr, so that these pipescommunicate solely with the sirup-channels and receive the siruptherefrom. The pipes I are set in collars fastened to the bottom J andturn therein. The pipes are connected by a curved bar, K, pivoted toeach of them, and also pivoted to a lever, L, which is jointed at itsinner end to the bottom J. By means of this lever and bar the pipes Ican be turned simultaneously so as to direct the different grades ofsirup into different tanks.

What I claim as new is l. The base of a centrifugal sugar-machineconstructed with an annular chamber having one or more inclined planes,as aforesaid, and'having also heating-spaces beneath said planes,substantially as and for the purpose described.

2. The combination of the base (l, adjustable pipes I, connecting-bar K,and lever L, substantially as and for the purpose specified.

JOHN SPARROW. Witnesses:

FEANOIs H. COEFIN, CHARLEs S. MUEOH.

